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Full text of "Handbook Of Chemical Engineering - I"

POWER GENERATION AND TRANSMISSION
61
which act to "fix" the condensible tars, but trouble may occur from clinkering. Crude oil has been used experimentally, but gas cleaning becomes a serious problem.
Composition of Gas.—Using pure air and pure carbon in the chemically necessary proportions, the gas would consist (by weight) of 0.345 CO and 0.655 N. Blast-furnace gas (which is producer gas incidentally manufactured) approximates this composition more nearly than do any of the producer gases specially made. Using x air and y steam, with symbols as above, gas constituents per pound of carbon are as follows:
WEIGHT, POUNDS
CO
C02
H2
Total
6.8 + 5.&c - 2.S7y
VOLUME, CUBIC FEET
31.8(1 -x) 31.7s 21y
60.6(1 + x) -40.4s/ 92.4 + 60.5x - 19.4y
Government tests by Fernald give the following :
		Bituminous coal	Sub-bituminous	Lignite	Peat
B.t.u. per pound of co Cubic foot of gas per p Rate of gasification	al	12,370 61.10 7.64 151.0 0.75 6.6 32.8 50.6 10.0	9,910 39.30 11.02 159.0 0.63 15.0 34.3 39.4 11.3	7,110 27.70 13.28 161.0 0.63 35.7 29.2 27.2 7.9	8,130 30.30 16.20 175.00 0.65 21.0 51.7 22.1 5.2
	>ound of coal				
					
B.t.u. per cubic foot gas, standard condensers                        .............					
Producer efficiency, coi Fuel analysis, per cent : Gas analysis by volume, per cent :	d gas basis ........				
	Moisture .......				
	Volatile ........ • Fixed carbon .... Ash .				
					
	Sulphur ......	2.3 9.71 0.02 0.19 19.03 13.48 2.78 54.79	0.9 11.16 0.12 0.20 17.52 14.41 3.64 52.95	1.1 9.90 0.13 0.10 20.86 14.30 200 . OO 51.83	0.5 12.40 0.40 21.00 18.50 2.20 45.50
	C02 ..............				
	O2				
	C2H4				
	CO              ....				
	H2 ...........				
	CH4 ..........				
	No ...............				
					
The table on following page gives typical results with various coals in different types of producer.